Nginx + Apache

I have a dedicated server which currently run the Nginx webserver. However, I want Apache installed as well, but without interfaring with sites already using Nginx. My ideal enirionment would be to be able to set which sites should use which webserver.

The reason I want this solution is that the guy I am sharing the server with uses Nginx on his projects, but mine requires the use of .htaccess (gives me a headache). And no, getting rid of Nginx is not an option at the moment.

My qustion is, what would be the best way to do?
It is also worth mentioning that I am no Linux guru at all, but I do manage to get around most of the time.

P.S. If this has been asked before, I apologize for making a duplicate post.